By the Numbers: How Presidential Candidates Stack Up on Social Media

Early campaigning on social media has never been so intense, with candidates turning to Twitter, Facebook and Instagram to engage supporters who are getting unprecedented access to White House hopefuls. "Now, candidates have a presence on a whole breadth of platforms with custom content to target that audience, and they are producing unprecedented levels of content—the sheer volume is impressive," said Marie Ewald Danzig, head of creative and delivery at Blue State Digital, which led digital efforts for the Obama campaign in 2008 and 2012.

Candidates are using social media to engage supporters.